Update, 5 a.m. EDT: After talks failed, the first in a series of five-day strikes by British Airways cabin crew begun this morning. It is expected to impact some flights in and out of London Heathrow.

(20 May, 2010) -- Fly-cruise passengers are set to face possible disruption once again after judges overturned a High Court injunction against British Airways' cabin crew union, Unite. This means that strikes can go ahead as planned from next week.

The first strike had been due to begin on Tuesday and end on May 22. Now, the three five-day strikes will take place on May 24, May 30 and June 5 unless an agreement can be reached between BA and the union.

So what flights will be disrupted?

All flights into and out of London Gatwick and London City airports will operate normally.

London Heathrow: For passengers travelling through until May 29, British Airways has published its planned flight schedules, so travellers should check the Web site.

BA has not listed flight details for the two final strike periods -- from May 30 to June 4 and June 5 to June 9. Flight schedules will be available on May 26.

A statement on BA's Web site says that the company is "very disappointed that Unite's appeal has been upheld, reintroducing the threat of strike action. Our key concern now is to keep as many of you flying as possible and we will be proceeding with our contingency plans." Unite's site, meanwhile, reads, "BA must now accept that negotiation not litigation is the only way to secure the settlement we all want."

Until the two come to an agreement, holidaymakers flying to their cruise ports will need to prepare for possible disruptions.